Presentation Information
[9a-B12-6]Charge Relaxation Dynamics and Reservoir Characteristics of Polymer-Wrapped SWCNT Oriented Nanofilms
〇(M2)Jumpei Igarashi1, Yuya Ishizaki-Betchaku2, Shusaku Nagano3, Hinako Ebe4, Jun Matsui4 (1.Grad. Sch. of Sci. and Eng., Yamagata Univ., 2.Fac. of Eng., Shinshu Univ., 3.Dept. of Chem., Coll. of Sci., Rikkyou Univ., 4.Fac. of Sci., Yamagata Univ.)
Keywords:
Reservoir computing,Single walled carbon nanotube,Nano device
Reservoir computing (RC) is an energy-efficient information processing framework that exploits the intrinsic dynamics of physical materials. Because nonlinearity and short-term memory are essential for RC, understanding charge relaxation processes is important. In this study, electrochemical impedance spectroscopy (EIS) was used to investigate polymer-wrapped single-walled carbon nanotube (SWCNT) oriented nanofilms fabricated by the Langmuir–Blodgett method.Oriented films exhibited pronounced nonlinearity and hysteresis, whereas randomly oriented films showed nearly linear responses. High humidity further enhanced conductivity and hysteresis, suggesting that adsorbed water molecules act as dopants and charge trapping sites. EIS measurements revealed non-ideal semicircular responses and additional low-frequency relaxation components, indicating multiple charge relaxation processes with distributed time constants. Waveform generation tasks also showed improved performance under humid conditions. These results demonstrate that charge relaxation dynamics governed by film orientation and humidity play a key role in reservoir performance.